Apparatus for injection-molding threaded plastic caps and stoppe

Details Apparatus for injection-molding threaded plastic caps and stoppe Apparatus for injection-molding threaded plastic caps and stoppe

1986-09-22

1988-09-20

Miles, Tim

Plastic article or earthenware shaping or treating: apparatus

Sets of male-female press molds

Including positive means to eject product

425422, 425438, B29C 3344

Patent

active

047721987

ABSTRACT:
In injection-molding threaded molded articles in the form of plastic caps and stoppers with or without imbedded reinforcing cages, an injection unit, a closing unit and an injection mold are provided, where the movable mold half is equipped with a threading part. The threading part is irrotational and integral. A rotating tool is provided, which for the condition of open injection mold can be moved between the mold halves and is operationally linked to the molded article so it can be jointly moved with it to unscrew the molded article from the threading part. Radial and axial centering pins are provided in the injection mold to center the cage.

REFERENCES:
patent: 2226326 (1940-12-01), Scott
patent: 2285297 (1962-06-01), McGinnis
patent: 2317823 (1943-04-01), Strauss
patent: 2404631 (1946-07-01), Gronemeyer
patent: 2408630 (1946-10-01), Green
patent: 2513216 (1950-06-01), Sullivan et al.
patent: 3006030 (1961-10-01), Paull
patent: 3247548 (1966-04-01), Fields et al.
patent: 3587144 (1971-06-01), Mechling
patent: 3726626 (1973-04-01), Bromberg
patent: 4155698 (1979-05-01), Aichinger
patent: 4157887 (1979-06-01), Sothje

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